src/mesa/state_tracker/st_draw.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /*
  29  * This file implements the st_draw_vbo() function which is called from
  30  * Mesa's VBO module.  All point/line/triangle rendering is done through
  31  * this function whether the user called glBegin/End, glDrawArrays,
  32  * glDrawElements, glEvalMesh, or glCalList, etc.
  33  *
  34  * We basically convert the VBO's vertex attribute/array information into
  35  * Gallium vertex state, bind the vertex buffer objects and call
  36  * pipe->draw_elements(), pipe->draw_range_elements() or pipe->draw_arrays().
  37  *
  38  * Authors:
  39  *   Keith Whitwell <keith@tungstengraphics.com>
  40  */
  41
  42
  43 #include "main/imports.h"
  44 #include "main/image.h"
  45 #include "main/macros.h"
  46 #include "main/mfeatures.h"
  47 #include "program/prog_uniform.h"
  48
  49 #include "vbo/vbo.h"
  50
  51 #include "st_context.h"
  52 #include "st_atom.h"
  53 #include "st_cb_bufferobjects.h"
  54 #include "st_draw.h"
  55 #include "st_program.h"
  56
  57 #include "pipe/p_context.h"
  58 #include "pipe/p_defines.h"
  59 #include "util/u_inlines.h"
  60 #include "util/u_format.h"
  61 #include "util/u_prim.h"
  62 #include "util/u_draw_quad.h"
  63 #include "draw/draw_context.h"
  64 #include "cso_cache/cso_context.h"
  65
  66
  67 static GLuint double_types[4] = {
  68    PIPE_FORMAT_R64_FLOAT,
  69    PIPE_FORMAT_R64G64_FLOAT,
  70    PIPE_FORMAT_R64G64B64_FLOAT,
  71    PIPE_FORMAT_R64G64B64A64_FLOAT
  72 };
  73
  74 static GLuint float_types[4] = {
  75    PIPE_FORMAT_R32_FLOAT,
  76    PIPE_FORMAT_R32G32_FLOAT,
  77    PIPE_FORMAT_R32G32B32_FLOAT,
  78    PIPE_FORMAT_R32G32B32A32_FLOAT
  79 };
  80
  81 static GLuint half_float_types[4] = {
  82    PIPE_FORMAT_R16_FLOAT,
  83    PIPE_FORMAT_R16G16_FLOAT,
  84    PIPE_FORMAT_R16G16B16_FLOAT,
  85    PIPE_FORMAT_R16G16B16A16_FLOAT
  86 };
  87
  88 static GLuint uint_types_norm[4] = {
  89    PIPE_FORMAT_R32_UNORM,
  90    PIPE_FORMAT_R32G32_UNORM,
  91    PIPE_FORMAT_R32G32B32_UNORM,
  92    PIPE_FORMAT_R32G32B32A32_UNORM
  93 };
  94
  95 static GLuint uint_types_scale[4] = {
  96    PIPE_FORMAT_R32_USCALED,
  97    PIPE_FORMAT_R32G32_USCALED,
  98    PIPE_FORMAT_R32G32B32_USCALED,
  99    PIPE_FORMAT_R32G32B32A32_USCALED
 100 };
 101
 102 static GLuint int_types_norm[4] = {
 103    PIPE_FORMAT_R32_SNORM,
 104    PIPE_FORMAT_R32G32_SNORM,
 105    PIPE_FORMAT_R32G32B32_SNORM,
 106    PIPE_FORMAT_R32G32B32A32_SNORM
 107 };
 108
 109 static GLuint int_types_scale[4] = {
 110    PIPE_FORMAT_R32_SSCALED,
 111    PIPE_FORMAT_R32G32_SSCALED,
 112    PIPE_FORMAT_R32G32B32_SSCALED,
 113    PIPE_FORMAT_R32G32B32A32_SSCALED
 114 };
 115
 116 static GLuint ushort_types_norm[4] = {
 117    PIPE_FORMAT_R16_UNORM,
 118    PIPE_FORMAT_R16G16_UNORM,
 119    PIPE_FORMAT_R16G16B16_UNORM,
 120    PIPE_FORMAT_R16G16B16A16_UNORM
 121 };
 122
 123 static GLuint ushort_types_scale[4] = {
 124    PIPE_FORMAT_R16_USCALED,
 125    PIPE_FORMAT_R16G16_USCALED,
 126    PIPE_FORMAT_R16G16B16_USCALED,
 127    PIPE_FORMAT_R16G16B16A16_USCALED
 128 };
 129
 130 static GLuint short_types_norm[4] = {
 131    PIPE_FORMAT_R16_SNORM,
 132    PIPE_FORMAT_R16G16_SNORM,
 133    PIPE_FORMAT_R16G16B16_SNORM,
 134    PIPE_FORMAT_R16G16B16A16_SNORM
 135 };
 136
 137 static GLuint short_types_scale[4] = {
 138    PIPE_FORMAT_R16_SSCALED,
 139    PIPE_FORMAT_R16G16_SSCALED,
 140    PIPE_FORMAT_R16G16B16_SSCALED,
 141    PIPE_FORMAT_R16G16B16A16_SSCALED
 142 };
 143
 144 static GLuint ubyte_types_norm[4] = {
 145    PIPE_FORMAT_R8_UNORM,
 146    PIPE_FORMAT_R8G8_UNORM,
 147    PIPE_FORMAT_R8G8B8_UNORM,
 148    PIPE_FORMAT_R8G8B8A8_UNORM
 149 };
 150
 151 static GLuint ubyte_types_scale[4] = {
 152    PIPE_FORMAT_R8_USCALED,
 153    PIPE_FORMAT_R8G8_USCALED,
 154    PIPE_FORMAT_R8G8B8_USCALED,
 155    PIPE_FORMAT_R8G8B8A8_USCALED
 156 };
 157
 158 static GLuint byte_types_norm[4] = {
 159    PIPE_FORMAT_R8_SNORM,
 160    PIPE_FORMAT_R8G8_SNORM,
 161    PIPE_FORMAT_R8G8B8_SNORM,
 162    PIPE_FORMAT_R8G8B8A8_SNORM
 163 };
 164
 165 static GLuint byte_types_scale[4] = {
 166    PIPE_FORMAT_R8_SSCALED,
 167    PIPE_FORMAT_R8G8_SSCALED,
 168    PIPE_FORMAT_R8G8B8_SSCALED,
 169    PIPE_FORMAT_R8G8B8A8_SSCALED
 170 };
 171
 172 static GLuint fixed_types[4] = {
 173    PIPE_FORMAT_R32_FIXED,
 174    PIPE_FORMAT_R32G32_FIXED,
 175    PIPE_FORMAT_R32G32B32_FIXED,
 176    PIPE_FORMAT_R32G32B32A32_FIXED
 177 };
 178
 179
 180
 181 /**
 182  * Return a PIPE_FORMAT_x for the given GL datatype and size.
 183  */
 184 GLuint
 185 st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
 186                       GLboolean normalized)
 187 {
 188    assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
 189           type == GL_FIXED || type == GL_HALF_FLOAT);
 190    assert(size >= 1);
 191    assert(size <= 4);
 192    assert(format == GL_RGBA || format == GL_BGRA);
 193
 194    if (format == GL_BGRA) {
 195       /* this is an odd-ball case */
 196       assert(type == GL_UNSIGNED_BYTE);
 197       assert(normalized);
 198       return PIPE_FORMAT_B8G8R8A8_UNORM;
 199    }
 200
 201    if (normalized) {
 202       switch (type) {
 203       case GL_DOUBLE: return double_types[size-1];
 204       case GL_FLOAT: return float_types[size-1];
 205       case GL_HALF_FLOAT: return half_float_types[size-1];
 206       case GL_INT: return int_types_norm[size-1];
 207       case GL_SHORT: return short_types_norm[size-1];
 208       case GL_BYTE: return byte_types_norm[size-1];
 209       case GL_UNSIGNED_INT: return uint_types_norm[size-1];
 210       case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
 211       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
 212       case GL_FIXED: return fixed_types[size-1];
 213       default: assert(0); return 0;
 214       }
 215    }
 216    else {
 217       switch (type) {
 218       case GL_DOUBLE: return double_types[size-1];
 219       case GL_FLOAT: return float_types[size-1];
 220       case GL_HALF_FLOAT: return half_float_types[size-1];
 221       case GL_INT: return int_types_scale[size-1];
 222       case GL_SHORT: return short_types_scale[size-1];
 223       case GL_BYTE: return byte_types_scale[size-1];
 224       case GL_UNSIGNED_INT: return uint_types_scale[size-1];
 225       case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
 226       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
 227       case GL_FIXED: return fixed_types[size-1];
 228       default: assert(0); return 0;
 229       }
 230    }
 231    return 0; /* silence compiler warning */
 232 }
 233
 234
 235
 236
 237
 238 /**
 239  * Examine the active arrays to determine if we have interleaved
 240  * vertex arrays all living in one VBO, or all living in user space.
 241  * \param userSpace  returns whether the arrays are in user space.
 242  */
 243 static GLboolean
 244 is_interleaved_arrays(const struct st_vertex_program *vp,
 245                       const struct st_vp_variant *vpv,
 246                       const struct gl_client_array **arrays,
 247                       GLboolean *userSpace)
 248 {
 249    GLuint attr;
 250    const struct gl_buffer_object *firstBufObj = NULL;
 251    GLint firstStride = -1;
 252    GLuint num_client_arrays = 0;
 253    const GLubyte *client_addr = NULL;
 254
 255    for (attr = 0; attr < vpv->num_inputs; attr++) {
 256       const GLuint mesaAttr = vp->index_to_input[attr];
 257       const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
 258       const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */
 259
 260       if (firstStride < 0) {
 261          firstStride = stride;
 262       }
 263       else if (firstStride != stride) {
 264          return GL_FALSE;
 265       }
 266
 267       if (!bufObj || !bufObj->Name) {
 268          num_client_arrays++;
 269          /* Try to detect if the client-space arrays are
 270           * "close" to each other.
 271           */
 272          if (!client_addr) {
 273             client_addr = arrays[mesaAttr]->Ptr;
 274          }
 275          else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {
 276             /* arrays start too far apart */
 277             return GL_FALSE;
 278          }
 279       }
 280       else if (!firstBufObj) {
 281          firstBufObj = bufObj;
 282       }
 283       else if (bufObj != firstBufObj) {
 284          return GL_FALSE;
 285       }
 286    }
 287
 288    *userSpace = (num_client_arrays == vpv->num_inputs);
 289    /* debug_printf("user space: %s (%d arrays, %d inputs)\n",
 290       (int)*userSpace ? "Yes" : "No", num_client_arrays, vp->num_inputs); */
 291
 292    return GL_TRUE;
 293 }
 294
 295
 296 /**
 297  * Compute the memory range occupied by the arrays.
 298  */
 299 static void
 300 get_arrays_bounds(const struct st_vertex_program *vp,
 301                   const struct st_vp_variant *vpv,
 302                   const struct gl_client_array **arrays,
 303                   GLuint max_index,
 304                   const GLubyte **low, const GLubyte **high)
 305 {
 306    const GLubyte *low_addr = NULL;
 307    const GLubyte *high_addr = NULL;
 308    GLuint attr;
 309
 310    /* debug_printf("get_arrays_bounds: Handling %u attrs\n", vpv->num_inputs); */
 311
 312    for (attr = 0; attr < vpv->num_inputs; attr++) {
 313       const GLuint mesaAttr = vp->index_to_input[attr];
 314       const GLint stride = arrays[mesaAttr]->StrideB;
 315       const GLubyte *start = arrays[mesaAttr]->Ptr;
 316       const unsigned sz = (arrays[mesaAttr]->Size *
 317                            _mesa_sizeof_type(arrays[mesaAttr]->Type));
 318       const GLubyte *end = start + (max_index * stride) + sz;
 319
 320       /* debug_printf("attr %u: stride %d size %u start %p end %p\n",
 321          attr, stride, sz, start, end); */
 322
 323       if (attr == 0) {
 324          low_addr = start;
 325          high_addr = end;
 326       }
 327       else {
 328          low_addr = MIN2(low_addr, start);
 329          high_addr = MAX2(high_addr, end);
 330       }
 331    }
 332
 333    *low = low_addr;
 334    *high = high_addr;
 335 }
 336
 337
 338 /**
 339  * Set up for drawing interleaved arrays that all live in one VBO
 340  * or all live in user space.
 341  * \param vbuffer  returns vertex buffer info
 342  * \param velements  returns vertex element info
 343  */
 344 static void
 345 setup_interleaved_attribs(struct gl_context *ctx,
 346                           const struct st_vertex_program *vp,
 347                           const struct st_vp_variant *vpv,
 348                           const struct gl_client_array **arrays,
 349                           GLuint max_index,
 350                           GLboolean userSpace,
 351                           struct pipe_vertex_buffer *vbuffer,
 352                           struct pipe_vertex_element velements[])
 353 {
 354    struct st_context *st = st_context(ctx);
 355    struct pipe_context *pipe = st->pipe;
 356    GLuint attr;
 357    const GLubyte *offset0 = NULL;
 358
 359    for (attr = 0; attr < vpv->num_inputs; attr++) {
 360       const GLuint mesaAttr = vp->index_to_input[attr];
 361       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 362       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 363       GLsizei stride = arrays[mesaAttr]->StrideB;
 364
 365       /*printf("stobj %u = %p\n", attr, (void*)stobj);*/
 366
 367       if (attr == 0) {
 368          const GLubyte *low, *high;
 369
 370          get_arrays_bounds(vp, vpv, arrays, max_index, &low, &high);
 371          /* debug_printf("buffer range: %p %p range %d max index %u\n",
 372             low, high, high - low, max_index); */
 373
 374          offset0 = low;
 375          if (userSpace) {
 376             vbuffer->buffer =
 377                pipe_user_buffer_create(pipe->screen, (void *) low, high - low,
 378                                        PIPE_BIND_VERTEX_BUFFER);
 379             vbuffer->buffer_offset = 0;
 380          }
 381          else {
 382             vbuffer->buffer = NULL;
 383             pipe_resource_reference(&vbuffer->buffer, stobj->buffer);
 384             vbuffer->buffer_offset = pointer_to_offset(low);
 385          }
 386          vbuffer->stride = stride; /* in bytes */
 387          vbuffer->max_index = max_index;
 388       }
 389
 390       velements[attr].src_offset =
 391          (unsigned) (arrays[mesaAttr]->Ptr - offset0);
 392       velements[attr].instance_divisor = 0;
 393       velements[attr].vertex_buffer_index = 0;
 394       velements[attr].src_format =
 395          st_pipe_vertex_format(arrays[mesaAttr]->Type,
 396                                arrays[mesaAttr]->Size,
 397                                arrays[mesaAttr]->Format,
 398                                arrays[mesaAttr]->Normalized);
 399       assert(velements[attr].src_format);
 400    }
 401 }
 402
 403
 404 /**
 405  * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
 406  * vertex attribute.
 407  * \param vbuffer  returns vertex buffer info
 408  * \param velements  returns vertex element info
 409  */
 410 static void
 411 setup_non_interleaved_attribs(struct gl_context *ctx,
 412                               const struct st_vertex_program *vp,
 413                               const struct st_vp_variant *vpv,
 414                               const struct gl_client_array **arrays,
 415                               GLuint max_index,
 416                               GLboolean *userSpace,
 417                               struct pipe_vertex_buffer vbuffer[],
 418                               struct pipe_vertex_element velements[])
 419 {
 420    struct st_context *st = st_context(ctx);
 421    struct pipe_context *pipe = st->pipe;
 422    GLuint attr;
 423
 424    for (attr = 0; attr < vpv->num_inputs; attr++) {
 425       const GLuint mesaAttr = vp->index_to_input[attr];
 426       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 427       GLsizei stride = arrays[mesaAttr]->StrideB;
 428
 429       *userSpace = GL_FALSE;
 430
 431       if (bufobj && bufobj->Name) {
 432          /* Attribute data is in a VBO.
 433           * Recall that for VBOs, the gl_client_array->Ptr field is
 434           * really an offset from the start of the VBO, not a pointer.
 435           */
 436          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 437          assert(stobj->buffer);
 438          /*printf("stobj %u = %p\n", attr, (void*) stobj);*/
 439
 440          vbuffer[attr].buffer = NULL;
 441          pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);
 442          vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
 443       }
 444       else {
 445          /* attribute data is in user-space memory, not a VBO */
 446          uint bytes;
 447          /*printf("user-space array %d stride %d\n", attr, stride);*/
 448
 449          *userSpace = GL_TRUE;
 450
 451          /* wrap user data */
 452          if (arrays[mesaAttr]->Ptr) {
 453             /* user's vertex array */
 454             if (arrays[mesaAttr]->StrideB) {
 455                bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
 456             }
 457             else {
 458                bytes = arrays[mesaAttr]->Size
 459                   * _mesa_sizeof_type(arrays[mesaAttr]->Type);
 460             }
 461             vbuffer[attr].buffer =
 462                pipe_user_buffer_create(pipe->screen,
 463                                        (void *) arrays[mesaAttr]->Ptr, bytes,
 464                                        PIPE_BIND_VERTEX_BUFFER);
 465          }
 466          else {
 467             /* no array, use ctx->Current.Attrib[] value */
 468             bytes = sizeof(ctx->Current.Attrib[0]);
 469             vbuffer[attr].buffer =
 470                pipe_user_buffer_create(pipe->screen,
 471                                        (void *) ctx->Current.Attrib[mesaAttr],
 472                                        bytes,
 473                                        PIPE_BIND_VERTEX_BUFFER);
 474             stride = 0;
 475          }
 476
 477          vbuffer[attr].buffer_offset = 0;
 478       }
 479
 480       assert(velements[attr].src_offset <= 2048); /* 11-bit field */
 481
 482       /* common-case setup */
 483       vbuffer[attr].stride = stride; /* in bytes */
 484       vbuffer[attr].max_index = max_index;
 485       velements[attr].src_offset = 0;
 486       velements[attr].instance_divisor = 0;
 487       velements[attr].vertex_buffer_index = attr;
 488       velements[attr].src_format
 489          = st_pipe_vertex_format(arrays[mesaAttr]->Type,
 490                                  arrays[mesaAttr]->Size,
 491                                  arrays[mesaAttr]->Format,
 492                                  arrays[mesaAttr]->Normalized);
 493       assert(velements[attr].src_format);
 494    }
 495 }
 496
 497
 498 static void
 499 setup_index_buffer(struct gl_context *ctx,
 500                    const struct _mesa_index_buffer *ib,
 501                    struct pipe_index_buffer *ibuffer)
 502 {
 503    struct st_context *st = st_context(ctx);
 504    struct pipe_context *pipe = st->pipe;
 505
 506    memset(ibuffer, 0, sizeof(*ibuffer));
 507    if (ib) {
 508       struct gl_buffer_object *bufobj = ib->obj;
 509
 510       switch (ib->type) {
 511       case GL_UNSIGNED_INT:
 512          ibuffer->index_size = 4;
 513          break;
 514       case GL_UNSIGNED_SHORT:
 515          ibuffer->index_size = 2;
 516          break;
 517       case GL_UNSIGNED_BYTE:
 518          ibuffer->index_size = 1;
 519          break;
 520       default:
 521          assert(0);
 522          return;
 523       }
 524
 525       /* get/create the index buffer object */
 526       if (bufobj && bufobj->Name) {
 527          /* elements/indexes are in a real VBO */
 528          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 529          pipe_resource_reference(&ibuffer->buffer, stobj->buffer);
 530          ibuffer->offset = pointer_to_offset(ib->ptr);
 531       }
 532       else {
 533          /* element/indicies are in user space memory */
 534          ibuffer->buffer =
 535             pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
 536                                     ib->count * ibuffer->index_size,
 537                                     PIPE_BIND_INDEX_BUFFER);
 538       }
 539    }
 540 }
 541
 542 /**
 543  * Prior to drawing, check that any uniforms referenced by the
 544  * current shader have been set.  If a uniform has not been set,
 545  * issue a warning.
 546  */
 547 static void
 548 check_uniforms(struct gl_context *ctx)
 549 {
 550    struct gl_shader_program *shProg[3] = {
 551       ctx->Shader.CurrentVertexProgram,
 552       ctx->Shader.CurrentGeometryProgram,
 553       ctx->Shader.CurrentFragmentProgram,
 554    };
 555    unsigned j;
 556
 557    for (j = 0; j < 3; j++) {
 558       unsigned i;
 559
 560       if (shProg[j] == NULL || !shProg[j]->LinkStatus)
 561          continue;
 562
 563       for (i = 0; i < shProg[j]->Uniforms->NumUniforms; i++) {
 564          const struct gl_uniform *u = &shProg[j]->Uniforms->Uniforms[i];
 565          if (!u->Initialized) {
 566             _mesa_warning(ctx,
 567                           "Using shader with uninitialized uniform: %s",
 568                           u->Name);
 569          }
 570       }
 571    }
 572 }
 573
 574
 575 /**
 576  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 577  * the corresponding Gallium type.
 578  */
 579 static unsigned
 580 translate_prim(const struct gl_context *ctx, unsigned prim)
 581 {
 582    /* GL prims should match Gallium prims, spot-check a few */
 583    assert(GL_POINTS == PIPE_PRIM_POINTS);
 584    assert(GL_QUADS == PIPE_PRIM_QUADS);
 585    assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 586
 587    /* Avoid quadstrips if it's easy to do so:
 588     * Note: it's imporant to do the correct trimming if we change the prim type!
 589     * We do that wherever this function is called.
 590     */
 591    if (prim == GL_QUAD_STRIP &&
 592        ctx->Light.ShadeModel != GL_FLAT &&
 593        ctx->Polygon.FrontMode == GL_FILL &&
 594        ctx->Polygon.BackMode == GL_FILL)
 595       prim = GL_TRIANGLE_STRIP;
 596
 597    return prim;
 598 }
 599
 600
 601
 602 /**
 603  * This function gets plugged into the VBO module and is called when
 604  * we have something to render.
 605  * Basically, translate the information into the format expected by gallium.
 606  */
 607 void
 608 st_draw_vbo(struct gl_context *ctx,
 609             const struct gl_client_array **arrays,
 610             const struct _mesa_prim *prims,
 611             GLuint nr_prims,
 612             const struct _mesa_index_buffer *ib,
 613             GLboolean index_bounds_valid,
 614             GLuint min_index,
 615             GLuint max_index)
 616 {
 617    struct st_context *st = st_context(ctx);
 618    struct pipe_context *pipe = st->pipe;
 619    const struct st_vertex_program *vp;
 620    const struct st_vp_variant *vpv;
 621    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 622    GLuint attr;
 623    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 624    unsigned num_vbuffers, num_velements;
 625    struct pipe_index_buffer ibuffer;
 626    GLboolean userSpace = GL_FALSE;
 627    GLboolean vertDataEdgeFlags;
 628    struct pipe_draw_info info;
 629    unsigned i;
 630
 631    /* Mesa core state should have been validated already */
 632    assert(ctx->NewState == 0x0);
 633
 634    /* Gallium probably doesn't want this in some cases. */
 635    if (!index_bounds_valid)
 636       if (!vbo_all_varyings_in_vbos(arrays))
 637          vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 638
 639    /* sanity check for pointer arithmetic below */
 640    assert(sizeof(arrays[0]->Ptr[0]) == 1);
 641
 642    vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
 643                        arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
 644    if (vertDataEdgeFlags != st->vertdata_edgeflags) {
 645       st->vertdata_edgeflags = vertDataEdgeFlags;
 646       st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
 647    }
 648
 649    st_validate_state(st);
 650
 651    /* must get these after state validation! */
 652    vp = st->vp;
 653    vpv = st->vp_variant;
 654
 655 #if 0
 656    if (MESA_VERBOSE & VERBOSE_GLSL) {
 657       check_uniforms(ctx);
 658    }
 659 #else
 660    (void) check_uniforms;
 661 #endif
 662
 663    memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
 664    /*
 665     * Setup the vbuffer[] and velements[] arrays.
 666     */
 667    if (is_interleaved_arrays(vp, vpv, arrays, &userSpace)) {
 668       /*printf("Draw interleaved\n");*/
 669       setup_interleaved_attribs(ctx, vp, vpv, arrays, max_index, userSpace,
 670                                 vbuffer, velements);
 671       num_vbuffers = 1;
 672       num_velements = vpv->num_inputs;
 673       if (num_velements == 0)
 674          num_vbuffers = 0;
 675    }
 676    else {
 677       /*printf("Draw non-interleaved\n");*/
 678       setup_non_interleaved_attribs(ctx, vp, vpv, arrays, max_index,
 679                                     &userSpace, vbuffer, velements);
 680       num_vbuffers = vpv->num_inputs;
 681       num_velements = vpv->num_inputs;
 682    }
 683
 684 #if 0
 685    {
 686       GLuint i;
 687       for (i = 0; i < num_vbuffers; i++) {
 688          printf("buffers[%d].stride = %u\n", i, vbuffer[i].stride);
 689          printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index);
 690          printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset);
 691          printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer);
 692       }
 693       for (i = 0; i < num_velements; i++) {
 694          printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index);
 695          printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset);
 696          printf("vlements[%d].format = %s\n", i, util_format_name(velements[i].src_format));
 697       }
 698    }
 699 #endif
 700
 701    pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer);
 702    cso_set_vertex_elements(st->cso_context, num_velements, velements);
 703
 704    setup_index_buffer(ctx, ib, &ibuffer);
 705    pipe->set_index_buffer(pipe, &ibuffer);
 706
 707    util_draw_init_info(&info);
 708    if (ib) {
 709       info.indexed = TRUE;
 710       if (min_index != ~0 && max_index != ~0) {
 711          info.min_index = min_index;
 712          info.max_index = max_index;
 713       }
 714    }
 715
 716    info.primitive_restart = st->ctx->Array.PrimitiveRestart;
 717    info.restart_index = st->ctx->Array.RestartIndex;
 718
 719    /* do actual drawing */
 720    for (i = 0; i < nr_prims; i++) {
 721       info.mode = translate_prim( ctx, prims[i].mode );
 722       info.start = prims[i].start;
 723       info.count = prims[i].count;
 724       info.instance_count = prims[i].num_instances;
 725       info.index_bias = prims[i].basevertex;
 726       if (!ib) {
 727          info.min_index = info.start;
 728          info.max_index = info.start + info.count - 1;
 729       }
 730
 731       if (u_trim_pipe_prim(info.mode, &info.count))
 732          pipe->draw_vbo(pipe, &info);
 733    }
 734
 735    pipe_resource_reference(&ibuffer.buffer, NULL);
 736
 737    /* unreference buffers (frees wrapped user-space buffer objects) */
 738    for (attr = 0; attr < num_vbuffers; attr++) {
 739       pipe_resource_reference(&vbuffer[attr].buffer, NULL);
 740       assert(!vbuffer[attr].buffer);
 741    }
 742
 743    if (userSpace)
 744    {
 745       pipe->set_vertex_buffers(pipe, 0, NULL);
 746    }
 747 }
 748
 749
 750 void st_init_draw( struct st_context *st )
 751 {
 752    struct gl_context *ctx = st->ctx;
 753
 754    vbo_set_draw_func(ctx, st_draw_vbo);
 755
 756 #if FEATURE_feedback || FEATURE_rastpos
 757    st->draw = draw_create(st->pipe); /* for selection/feedback */
 758
 759    /* Disable draw options that might convert points/lines to tris, etc.
 760     * as that would foul-up feedback/selection mode.
 761     */
 762    draw_wide_line_threshold(st->draw, 1000.0f);
 763    draw_wide_point_threshold(st->draw, 1000.0f);
 764    draw_enable_line_stipple(st->draw, FALSE);
 765    draw_enable_point_sprites(st->draw, FALSE);
 766 #endif
 767 }
 768
 769
 770 void st_destroy_draw( struct st_context *st )
 771 {
 772 #if FEATURE_feedback || FEATURE_rastpos
 773    draw_destroy(st->draw);
 774 #endif
 775 }
 776
 777